a) \(\left|4x-2\right|=47-3x\)
\(\Rightarrow\left[{}\begin{matrix}4x-2=47-3x\\4x-2=-47+3x\end{matrix}\right.\)
\(\Rightarrow\left[{}\begin{matrix}x=7\\x=-45\end{matrix}\right.\)
b) \(\left|3x-2\right|=x+2\)
\(\Rightarrow\left[{}\begin{matrix}3x-2=x+2\\3x-2=-x-2\end{matrix}\right.\)
\(\Rightarrow\left[{}\begin{matrix}x=2\\x=0\end{matrix}\right.\)
c) \(\dfrac{x+3}{x-3}-\dfrac{1}{x}-\dfrac{3}{x^2-3x}=0\left(đk:x\ne0,3\right)\)
\(x\left(x+3\right)-x\left(x-3\right)-3=0\)
\(x^2+3x-x^2+3x-3=0\)
\(6x=3\)
\(x=\dfrac{1}{2}\left(TM\right)\)
